2003/03/13 by Roland Schneider, R. A. Schneider, Schneider, R. A. · 2 citations
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0303104
12 pages, 1 figure
arxiv created 2003/03/13 · openalex publication_date 2003/03/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present for the first time a self-contained calculation of the QCD running coupling at finite temperature and quark chemical potential, alphas(T, mu), based on a semiclassical background field method. The hard thermal/dense loop results on the Debye screening mass are recovered in a first approximation. The final result can be interpreted as the ordinary zero temperature running coupling, with momenta replaced by in-medium scales Lambda: at high density and zero temperature, the quark scale is set by Lambda ~ 24.4 mu. At high temperature and moderate densities, the quark in-medium scale reads Lambda2 ~ [2.91 T]2 + [1.91 mu]2, which resembles the naive phenomenological estimate Lambda2 = (pi T)2 + mu2.